How to read a cookie in the browser with Dart?

问题

Question looks simple but I couldn't find in the docs how to read a cookie with Dart on client side without 3-rd party libs.

How can I do it?

回答1:

In the dart:html library you can use document.cookie. This will return a String of all the cookies on the client. Each cookie is separated with a semi-colon and the key value pairs are separated with a "=". Example;

"foo=bar; otherFoo=otherBar"

So it's up to you to split the String accordingly into a data type that you want to work with.

Also see: Document.cookie - Web APIs | MDN

回答2:

I am using documnet.cookie and this class to maintain the cookies.

import 'dart:html';

class CookieManager {

  static addToCookie(String key, String value) {
    document.cookie = "$key=$value;";
  }

  static String getCookie(String key) {

    String cookies = document.cookie;
    List<String> listValues = cookies.isNotEmpty ? cookies.split(";") : List();
    String matchVal = "";
    for (int i = 0; i < listValues.length; i++) {
      List<String> map = listValues[i].split("=");
      String _key = map[0].trim();
      String _val = map[1].trim();
      if (key == _key) {
        matchVal = _val;
        break;
      }
    }
    return matchVal;
  }
}

来源：https://stackoverflow.com/questions/42565211/how-to-read-a-cookie-in-the-browser-with-dart